221121846363841 has 16 divisors (see below), whose sum is σ = 230883166765440. Its totient is φ = 211372831521280.

The previous prime is 221121846363791. The next prime is 221121846363877. The reversal of 221121846363841 is 148363648121122.

It is a cyclic number.

It is not a de Polignac number, because 221121846363841 - 2²⁷ = 221121712146113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121846367841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348693105 + ... + 349326673.

It is an arithmetic number, because the mean of its divisors is an integer number (14430197922840).

Almost surely, 2^{221121846363841} is an apocalyptic number.

It is an amenable number.

221121846363841 is a deficient number, since it is larger than the sum of its proper divisors (9761320401599).

221121846363841 is a wasteful number, since it uses less digits than its factorization.

221121846363841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643256.

The product of its digits is 2654208, while the sum is 52.

The spelling of 221121846363841 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, eight hundred forty-six million, three hundred sixty-three thousand, eight hundred forty-one".